1.   However, the products obtained from reactions with halides can be rather surprising - ie the dithiadiazole can trap free radical intermediates.

2.   Signals change the shape of an enzyme, thus affecting its reaction with a protein.

3.   Slates eventually Decay because of their reaction with weak acids formed from sulphur and other atmospheric pollutants dissolved in rainwater.

4.   The catalysed conversion of methanol to ethanol by reaction with syn-gas, is also possible but not yet commercial.

5.   Reactions with very fast rates often involve particles known as free radicals.

6.   Phospholipid concentrations were determined by enzymatic reaction with phospholipase D and subsequent determination of free choline using colorimetry.

7.   Unknown to the teacher he had taken with him a test tube of the acid to test its reaction with lavatory paper.

8.   He over-simplified American reactions with his comment that they particularly resented the fact that we had acted on our own without American permission or concurrence.

9.   Also, certain medications, notably those for hypertension, can have dangerous and even fatal reactions with UV-A radiation.